John h



`-(No Model.)`

J. H. FRY. ADJUSTABLE FOLDING DESK.

WED

Patented Apr. 14, 1891.

WIM/8858:

UNITED STATES PATENT OFFICE;

JOHN H. FRY, OE GRAND RAPIDS, MIOHIGAN, ASSIGNOR OF ONE-HALE TO EDGAR A. FLETCHER, OF SAME PLACE.

ADJUSTABLE FOLDING DESK.

SPECIFICATION forming part of Letters Patent No. 450,580, dated April 14, 189,1.

Application filed February 24, 1891. Serial No. 382,653. (No model.)

To all whom, t nur?! concern.'

Be it known that I, JOHN H. FRY, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Adjustable Folding Desks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in adjustable folding desks. My object is to provide a means of adj usting the vertical inclination of the desk-top and arresting such inclination at any desired angle, as well as to provide a simple and effective means of adjusting the other coacting parts and stiffening and strengthening the struct-ure; and it consists in the construction, combination, and arrangement of the various parts hereinafter described, and particularly pointed out in the claims, reference being hadto the accompanying drawings, wherein- Figure l represents atransverse vertical section of a device embodying myinvention, on the line y/y of Fig. 3, open, with the top adjusted at a slight angle; Fig. 2, the same folded; Fig. 3, a longitudinal vertical section on the line yg] of Fig. 1; Fig. 4, a detail of detached portion.

Like letters indicate like parts throughout the drawings.

A A represent the two leaves or oppositelyinclined sides of the top. They are hinged upon opposite sides to opposite side edges of the horizontal bar D, which has a strip E secured upon its upper side between the inner edges of said leaves, upon which is detachably placed the cap-strip F, provided with pins L, engaging suitable apertures or sockets therein. rlhe bar D has at each end vertically-arranged depending bars C, having slots O in the lower portion thereof, and provided with angle-braces II for rigidity and strength. The cross-legs B B are hinged oppositely to opposite leaves A A at their upper ends, and the opposite pairs are connected together by a clamping-rod H, upon the outer ends whereof the pairs are respectively pivoted, and which is provided with washers N N and thumbnuts M M and arranged within the tubular spreading-bar G, the outer ends whereof engage the inner sides of the bars C for limiting the inward movement of both the bars C and legs B, and thereby giving rigidity to the structure, and the projecting ends of the rod H pass through slots O in bars O, and thence through the cross-legs, and its tension is adjusted at either end by thumb-nuts M M, whereby, as is obvious, the bars O may be vertieally adjusted, and thereby t-he opening and closing` of said cross-legs and the inclination of the leaves A A is provided for. At the lower edge of the leaf A is arranged a strip J, provided with a retaining-screw K, arranged in diagonal slot O, whereby said strip may be adjusted as desired to prevent articles from sliding off.

What I claim as new, and desire to secure by Letters Patent ofthe United States, is-

1. The combination of horizontal bar D, leaves A, hinged at its side edges, depending bars O, clamping-rod H, engaging the bars O and provided with nuts M, and cross-legs B, hinged to leaves A and pivoted on rod H, substantially as and for the purposes set forth.

2. The combination of horizontal bar D, leaves A, hinged at its side edges, depending bars O, having slots C', clamping-bar H, engaging slots C and provided with nuts M, and cross-legs B', pivoted on rod H, and hinged to leaves A, substantially as set forth.

3. The combination of horizontal bar D, leaves A, hinged at its side edges, strip E, secured on the barD and between the edges of leaves A, as set forth, depending bars O, having slots O,clampingbar H, engaging slots O and having nuts M, and cross-legs B, pivoted on rod H and hinged to leaves A, substantially as set forth.

4. The combination of horizontal bar D, leaves A, hinged at its side edges, depending bars O, clamping-rod H, engaging the bars C and arranged wit-hin the tubular spreadingbar G, the spreading-bar G, and cross-legs B, pivoted on rod H and hinged to leaves A, sub.- stantially as and for the purposes set forth.

5. Th e combination, with the horizontal bar D, having the leaves A hinged upon each side thereof, and the strip E, attached to bar D and arranged between the leaves A, as set IOO forth, of the cap-strip F, arranged npon the l strip E, substantially as set fori l1. 6. The combination, with the leaf A, of the l strip J, having diagonal slot O, and screw K, l arranged Within the slot., as set forth. 7. The combination, with the horizontal bar D, having leaves A hinged at its side edges, l and the strip E, arranged thereon and bel tween the edges of said leaves, depending bars l C, having slots C', crossed legs B, hinged to l leaves A, clamping-bar H, engaging slots C l and having nuts M, and spreading-bar G, arl ranged below the bai-D and engaging the inl ner sides of the bars C, substantially as and for the purposes set forth.

S. rlhe Combination, with the horizontal har D, having leaves A hinged at its side edges, and the strip E arranged thereon and between the edges of said leaves, depending bars C, having slots C', braces I, crossed legs B,

, hinged to leaves A, Clamping-bar H, having nnts M and arranged within spreading-brace G, and engaging the slots C', and the spreading-brace G, arranged between bars C, substantially as described, and for the purposes herein set forth.

ln testimony1 whereotl I affix in y sign atn re in presence ot' two witnesses.

JOHN lll. FRY. Witnesses:

llENNIs l.. ROGERS, WDGAR A. FLETCHER. 

